Dia is the AI browser for people who want help with their tabs more than an agent that clicks for them. In 2026 it changed in two ways that matter to buyers: its AI features moved behind $20 and $100 monthly plans, and a Windows version arrived in early form.
Key Takeaways
- An assistant more than an agent. — Dia's AI works across your tabs, answers on the page and drafts text. Its full agentic experience had still not shipped by October 2026.
- AI is now paid for new Mac users. — Since August 17, 2026, new users get a free plan with no AI, a $20 a month plan for core AI features and a $100 a month plan for Reports, Morning Brief and higher limits.
- Windows is early. — Dia for Windows became downloadable on October 7, 2026, but its own setup screen calls it an early build that is not yet security-tested.
What does Dia do?
Dia, from The Browser Company that made Arc, puts an assistant in the address bar. It answers questions about the page and across open tabs, drafts text, and runs Skills, which are saved shortcuts for repeated AI tasks. Opt-in History lets answers draw on up to seven days of browsing, and connectors added in 2026 bring in Slack, Notion, Google Calendar and Gmail (Wikipedia).
Atlassian bought The Browser Company in a deal announced in September 2025 and closed that October, and positions Dia as the browser for knowledge workers. What Dia does not do yet is act on sites as an agent. When Dia for Windows shipped on October 7, 2026, coverage noted that its full agentic experience was still to come.
Scorecard: 9/20
Four criteria, 1 to 5 each: what the agent can do, what an admin can control, safety by design, and reach (platforms, regions, price of entry). These are editorial assessments of published documentation and announcements, not hands-on benchmarks. They match the Best AI Browsers ranking.
| Criterion | Score | Why |
|---|---|---|
| Agent | 2/5 | Strong at answering and drafting across tabs; limited autonomous action so far. |
| Control | 2/5 | Connectors to Slack, Google Workspace and Atlassian, but no documented admin policy for AI features. |
| Safety | 3/5 | Less autonomy means a smaller attack surface; memory and history features still widen what the AI can read. |
| Reach | 2/5 | macOS on Apple silicon; Windows in an early, not security-tested build; AI needs a paid plan for new users. |
How much does Dia cost?
| Plan | Price | What it covers |
|---|---|---|
| Free | $0 | Profiles, tab groups, ad blocker, sync. No AI features. |
| Core AI | $20 a month | Connectors, tab context, Ask on page |
| Advanced AI | $100 a month | Adds Reports, Morning Brief and higher usage limits |
The plans began rolling out on August 17, 2026 for new Mac users (PiunikaWeb). Existing users kept their AI features for now and were promised at least 30 days' notice. Dia's plan names are informal in the coverage; the prices are as published in October 2026.
Who it fits, and who should look elsewhere
- Fits: Mac-based knowledge workers, especially in Atlassian, Slack and Google Workspace shops, who want answers and drafts across their tabs without handing actions to an agent.
- Look elsewhere: if you need an agent that completes tasks, a managed Windows rollout, or documented admin controls. Comet, Gemini in Chrome and Claude in Chrome all act on sites today.
Dia alternatives
- Perplexity Comet: an agent browser that is free to start and runs on every platform.
- Opera Neon: agentic modes and a free plan for outside agents.
- Gemini in Chrome: AI help in the browser most companies already manage.
- Microsoft Edge: AI features that IT can switch off by policy; see the hub ranking.
Related questions
- Which AI browsers are worth shortlisting in 2026?
- Is Perplexity Comet a better pick for teams?
- Which standalone browser lets you review an agent's plan before it runs?
- Should a company block, sandbox or pilot agentic browsers? (partner site CTAIO)
Sources
- PiunikaWeb, Dia announces monthly AI plans (Aug 18, 2026).
- PiunikaWeb, Dia browser launches on Windows (Oct 7, 2026).
- Wikipedia, Dia (web browser) (release history and Atlassian acquisition).
- nohacks.co, The agentic browser landscape in 2026 (updated Sep 27, 2026).
Is the Dia browser free?
The browser is, but its AI is not for new Mac users. Since August 17, 2026, the free plan includes profiles, tab groups, an ad blocker and sync with no AI features. AI starts at $20 a month, and the $100 a month plan adds Reports, Morning Brief and higher limits. Existing users kept their features for now, with at least 30 days' notice promised before paid plans reach them.
Is Dia available on Windows?
Yes, as an early build. Dia for Windows became publicly downloadable on October 7, 2026. The setup screen describes it as an early, untested build that is not yet security-tested and not recommended for daily use.
Who owns Dia?
Atlassian. It agreed to buy The Browser Company, the maker of Arc and Dia, in September 2025 for about $610 million in cash, and closed the deal in October 2025. Arc now receives Chromium updates only.
Is Dia an agentic browser?
Not fully. Dia's AI reads and reasons across your tabs and connected apps and drafts output, but as of October 2026 its full agentic experience, where the AI acts on sites for you, had not shipped. For a browser agent today, look at Perplexity Comet, Gemini in Chrome or Claude in Chrome.
Ready to Find the Right AI Tools?
Browse our data-driven rankings to find the best AI tools for your team.